There are many types of methods of piling as shown below. You can trust our experience to help you choose the right solution for your project.

Piling Companies London – Mini /Micro Segmental Piling (SFA) Segmental Flight Auger

This method is good for limited site access and limited headroom. For works, we will use rigs ranging from a 2-Ton, door entrance drivable rig which can drill piles from 150mm up to 300mm in diameter maximum depth 15m, up to a 15-Ton piling rig which can drill from 300mm diameter up to 450mm in diameter down to 20m. Augers came on 1m -1.5m section and are installed manually metre by metre down. This solution will work for clay or chalk grounds, the borehole needs to stay formed and open with no water strikes and gravels. This method is vibration free.

Piling contractors in London – Mini/Micro Segmental Piling (SFA)Segmental Flight Auger with hollow stem grout/concrete injection through the augers

This method is good for limited site access and limited height headrooms, for works we will use a range of rigs from a 3-Ton rig which can drill piles from 250mm up to 450mm in diameter, maximum depth 15m, up to a 15-Ton piling rig which can drill from 300mm diameter up to 600mm in diameter down to 17m. Augers come on 1m -1.5m section and are installed manually metre by metre down. This solution will work for wet, gravels, sandy ground conditions, the borehole will collapse after auger extraction. This method allows us to pump concrete through the middle of augers while slowly augers are taken out from the ground, filled concrete will stop the sides of the bored holes collapsing in. The next step is to install reinforcement in the hole to finish the pile off while the concrete is still fresh and wet. This method is vibration free.

Piling contractors London – Drop Hammer/Steel Cased Bottom Driven Piles

This method allows us to install metal tubes in the ground by dropping weight on them, constantly driving them down until the required depth is achieved. The tubes are then cut off to the correct height, reinforced and concreted. Driven metal casing piles are a good solution for the ground where loose material would not allow a borehole to be easily formed, once tubes have penetrated the ground surface they are then driven down into the virgin ground, where they start compacting the existing strata until they cannot be driven down any further. We provide diameters from 150mm up to 300mm. The piling rig that we use is a compacted 3-Ton rig with 780mm wide tracking access.

Steel Cased Grundomat Driven Piles

The same as the drop hammer method, but using pneumatic air equipment which will produce less vibration in the ground compared to the drop hammer method, this solution is limited on pile load capacity and works perfectly on small domestic projects. Nearly unlimited site access. Pile diameter from 100mm up to 150mm.

CFA Piling Continuous Flight Auger

This is a method that will suit semi-open and open sites such as new builds. The piling rig that can be used, dependent on the pile specification, is from-15 Ton up to 60-Ton rigs. A string of auger goes into the ground as one hit and depending on the piling rig specification, strings of augers can be ranged from 12m down to 25m including a special kelly bar which will push augers down. This is a quick method of piling, taking only 10-15 min for a pile including concreting (again we can leave the borehole open or we can concrete the borehole through the middle of augers). Pile diameter from 300mm to 600mm.

Rotary Bored Piling (RBA)

This particular method can be used where a high load capacity of the pile is required, but where the pile depth is limited. A rotary piling rig can have a phenomenally big diameter, so it will allow getting good ground bearing base on mass concrete fill, and you can still pile to a reasonable depth (circa 25m).
RBA is an option suited for clay /chalk grounds where open bore pile can be formed without the need of concreting via an auger.
Rigs usually have a telescopic bar and 1-1.5m auger bit at the end. The operator spins the auger into the ground at the same depth as the auger bit, removing the auger out where the scooped soils rest at auger, then swings the rig out on site spinning the auger to shake free the resting soil. This operation is repeated with the auger depth increased each time until the required pile depth is reached.